Actually, when I read your original question, what occurred to me was that IBM had extended the C.U.I.R. (Control Unit Initiated Reconfiguration) concept to allow the HMC/SE to communicate with the operating systems running on a machine to gracefully take CHPIDs offline/online, similar to C.U.I.R. on DASD/Tape control units.
The original C.U.I.R. is pretty old - it was introduced in the early 1990's on IBM 3990 control units. It was also initially problematic, as I recall. The (nasty) symptoms in APAR OW07911 somehow seem very very familiar.... Brian On Fri, 15 Dec 2006 14:49:03 -0800, Edward Jaffe wrote: >Clear as mud. Conflicting statements. It sounds as if Brian Peterson's >speculation is correct. Specifically, some hardware/software handshake >functionality, that got backed out because it never really worked, was >prematurely documented in z/OS MVS System Commands. I suppose an RCF is >in order here. ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
